Language-learning platform, US
A platform with thousands of paying customers and over 500,000 free users. I've been its technical partner since 2020, responsible for the full technology function: web and mobile applications, backend, infrastructure, AI systems, payments, integrations, marketing technology and analytics. AI features running there for paying users include real-time voice conversation, RAG-based lesson assistance, automated content generation and translation pipelines.
AI customer support chatbot
A RAG chatbot that ingests company documents, website content and knowledge bases, then answers customer questions from them. Real-time embedding, conversational memory, and a widget that drops into any site.
Voice-based story chatbot
A voice-to-voice assistant that discusses stories and texts with readers. Speech in through Whisper, a language model in the middle, Google text-to-speech out.
AI workflow automation platform
Agents that carry out multi-step business processes: document processing, content generation, data analysis. A visual builder for custom chains, scheduled runs, approval steps, and an API. Credit-based billing.
Agentic dictionary and pronunciation checker
Combines the Oxford Dictionary API for definitions, a language model for example sentences, and Azure speech assessment for pronunciation scores with feedback.
Chat with PDF
Upload PDFs and ask questions about them in a chat interface. Answers are drawn from the document content.
Study companion · My own
Turns notes, PDFs and lecture videos into flashcards, practice questions and summaries, with spaced repetition.
Language-learning Chrome extension
Translate text on any web page and save words and phrases to a vocabulary list for later review.
Vocabulary trainer
A spaced-repetition system with custom word lists and review scheduling based on how well each word is known. Web and mobile.
Custom learning management system
Course management, Stripe and PayPal payments, roles, progress tracking, assessments, gradebooks and analytics. Built for subscription courses.
Online event management
Scheduling, Zoom integration, registration, event pages, notifications and access control, for educators running events online.
Discord bot
Role management, permission automation, content moderation with custom filters, and language-model answers to common questions.
WordPress
Over 100 WordPress sites built and maintained: custom themes, plugins, integrations and performance work.